Open With Internet Explorer sends pages from Mozilla Firefox to Internet Explorer.
YouTube Video Player Pop Out lets you pop out YouTube videos so that you can watch YouTube videos while you surf.
Nightly Tester Tools Requires Restart
Useful tools for the nightly tester.
Forecastfox (fix version) Requires Restart
Get international weather forecasts from AccuWeather.com and display them in any toolbar or statusbar with this highly customizable and unobtrusive extension.
Now Available for: Firefox, Thunderbird and SeaMonkey!
Open With Google Chrome sends pages from Mozilla Firefox to Google Chrome.
Watch videos anywhere in cinema mode without leaving the website you're on.
'Classic Toolbar Buttons' add-on restores old toolbar button ui (known from Fx 4-7s small view, Fx 4-12s large view & Tb 5-14) for current Firefox, Thunderbird and Seamonkey versions on Windows.
Beta builds on versions page!
Theme Font & Size Changer lets you change the global font size and font family used for the user interface in Firefox. Design your browser with your favorite font.
Stylish Requires Restart
Restyle the web with Stylish, a user styles manager. Stylish lets you easily install themes and skins for Google, Facebook, YouTube, Tumblr, and many, many other sites. You can even customize Firefox and other programs themselves.
A full featured color selector tool, to work with colors, and easily find the colors you want.
See more search results etc. on one page, concatenating several pages together...
Speed Dial & Start Page with flexible layout for fast access to sites via visual bookmarks
QuickFolders (Tabbed Folders) Requires Restart
The "Swiss army knife" of folders. Turn your favorites into tabs - open folders and subfolders, move mails without scrolling around or searching. powerful + easy.
See new mail at a glance after automatic filtering - supports quickFilters addon!
Tategaki Requires Restart
Tategaki allows vertical writing-mode on mail compose window.
Keeps track of your browser tab number.
Google Hangouts Web Messenger brings Google Hangouts right into your browser to chat with your friends.
Open With Vivaldi Browser sends pages from Mozilla Firefox to Vivaldi browser.
CuteButtons - Crystal SVG Requires Restart
Adds colourful icons to buttons and menus
GNOMErunner Options Requires Restart
Allows to customize GNOMErunner theme
The "Responsible Blocker" arrives to save the Internet, this extension blocks all those annoying ads, but allows only small and acceptable ads, so the websites you like can continue online.
The "Responsible Blocker" arrives to save the Internet!